60
Gossen Metrawatt GmbH
When testing in accordance with product standards (e.g.
EN 61010 or EN 60335), measurements must be conducted
under all fault conditions. For testing after repair or periodic testing
it’s usually sufficient to perform measurement in the
Normal Status
setting.
Prerequisites for Touch Current Measurement
•
Visual inspection has been passed.
•
With protection class I DUTs:
Protective conductor resistance testing has been passed.
•
Insulation resistance testing has been passed.
Test Procedure for Direct and Differential Current Methods
➭
Before conducting any leakage current measurements, make
sure that the “Ref. voltage L-PE” and “Alt. Test Freq.” mea-
surement parameters have been set correctly in SETUP (see
section 13.3). Set the rotary switch to the
I
T
position.
➭
➭
Select measurement type
Direct
P1
or
Differential P1
:
– By setting the parameters
or
– Via the
Measurement Type
key
➭
In the case of
direct and differential current measurement
,
measurement must be performed with mains plug po-
larity in both directions. Press the
Polarity
softkey in
order to change polarity.
➭
Connect the DUT’s mains plug (protection class II) to the test in-
strument’s test socket.
Attention!
!
Testing is conducted in the presence of line voltage.
➭
Start the test:
Press the
START
/STOP
key.
➭
Acknowledge the warning which indicates that line
voltage will be connected to the test socket.
➭
Switch the device under test on.
➭
Contact all accessible conductive parts, one after the other,
which are not connected to the housing with test probe P1.
➭
The measured values are displayed. The measured
value recording icon shown at the right appears. Each
time this key is pressed, the currently displayed mea-
sured value is saved to buffer memory.
➭
Turn off the device under test.
➭
End the test:
Press the
START
/STOP
key.
The save icon appears (floppy disk showing the num-
ber of measured values stored to buffer memory) and
prompts you to save the measured values to a test ob-
ject ID number.
➭
Read the measured values and compare them with the
table of permissible limit values.
➭
Press the
ESC
key in order to discard the measured
values stored to buffer memory and acknowledge by
pressing the key shown at the right.
Test Procedure for Alternative Measuring Method – Alternative P1
➭
Before conducting any leakage current measurements, make
sure that the “Ref. voltage L-PE” and “Alt. Test Freq.” mea-
surement parameters have been set correctly in SETUP (see
section 13.3).
➭
Set the rotary switch to the
I
T
position.
➭
Select the
Alternative
P1 measurement type:
– By setting the parameters
or
– Directly via the
Measurement Type
key
➭
Connect the DUT’s mains plug to the test instrument’s test
socket.
➭
Start the test:
Press the
START
/STOP
key.
➭
Contact all accessible conductive parts, one after the
other, which are not connected to the protective con-
ductor with test probe P1.
➭
The measured values are displayed. The measured
value recording icon shown at the right appears. Each
time this key is pressed, the currently displayed mea-
sured value is saved to buffer memory.
➭
End the test:
Press the
START
/STOP
key.
The save icon appears (floppy disk showing the num-
ber of measured values stored to buffer memory) and
prompts you to save the measured values to a test ob-
ject ID number.
➭
Read the measured values and compare them with the
table of permissible limit values.
➭
Press the
ESC
key in order to discard the measured
values stored to buffer memory and acknowledge by
pressing the key shown at the right.
Test Procedure for Alternative Measuring Method – Alternative
P1–P2
Only with feature H01 (e.g. SECUTEST ST PRO)
➭
Before conducting any leakage current measurements, make
sure that the “Ref. voltage L-PE” and “Alt. Test Freq.” mea-
surement parameters have been set correctly in SETUP (see
section 13.3).
➭
Set the rotary switch to the
I
BT
position.
➭
Select the
Alternative P1–P2
measurement type:
– By setting the parameters
or
– Directly via the
Measurement Type
key
➭
Start the test:
Press the
START
/STOP
key.
➭
Using test probe P1, contact the first accessible part
which is not connected to the protective conductor.
➭
Using test probe P2, contact all accessible conductive parts,
one after the other, which are connected neither to the protec-
tive conductor nor to the first accessible part contacted with
test probe P1.
➭
The measured values are displayed. The measured
value recording icon shown at the right appears. Each
time this key is pressed, the currently displayed mea-
sured value is saved to buffer memory.
➭
End the test:
Press the
START
/STOP
key.
The save icon appears (floppy disk showing the num-
ber of measured values stored to buffer memory) and
prompts you to save the measured values to a test ob-
ject ID number.
➭
Read the measured values and compare them with the
table of permissible limit values.
➭
Press the
ESC
key in order to discard the measured
values stored to buffer memory and acknowledge by
pressing the key shown at the right.
Maximum Permissible Limit Values for Touch Current in mA
Key
I
T
Touch current (leakage current from welding current)
Test Standard
I
T
VDE 0701-0702 / ÖVE E 8701 / SNR 462638
EN 50678 / VDE 0701
EN 50699 / VDE 0702
0.5
IEC 60974-4 / EN 60974-4 / VDE 0544-4
10 mA
IEC 62368 / EN 62368 / VDE 0868-1
At ES1 0.5 mA AC
2 mA DC
Summary of Contents for SECULIFE ST BASE 25
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